Cleaning and Inspection

1. Remove the EGR vacuum regulator solenoid.
2. Lightly blow air into the EGR vacuum regulator solenoid and verify that air does not flow.
3. Apply battery voltage and a ground to the EGR vacuum regulator solenoid at the connector.
4. Lightly blow air into the EGR vacuum regulator solenoid and verify that air does flow through the EGR vacuum regulator solenoid.
5. If air does not blow through the EGR vacuum regulator solenoid, replace the EGR vacuum regulator solenoid.
6. Install EGR vacuum regulator solenoid.